Private detective Tony Rome (Frank Sinatra) is scuba diving off the coast of Miami when he discovers a dead blonde with her feet incased in cement on the sea bed. He begins to investigate why she was killed after being hired by man mountain Waldo (Dan Blocker). Tony begins his investigation in seedy girlie bars (of course) and discovers rich beauty Kit (Raquel Welch) is involved somehow, as is retired hoodlum Mungar (Martin Gabel)...
Not a bad film though doesn't make a huge amount of sense, it just seems to slide from scene to scene with some amusing quips by Sinatra and physical humour from Blocker. The film needs an edge but is a little too light to give it one.
But it is perfectly entertaining enough to be worthwhile. It tries very hard to be cool, and sometimes succeeds. The psychedelic-ish girlie bar for example.